package com.cscp.javastudy.juc.threaddemo;

import java.util.concurrent.CountDownLatch;

/**
 * 计数器(减法)
 */
public class CountDownLatchDemo1 {

    public static void main(String[] args) throws InterruptedException {
        CountDownLatch countDownLatch = new CountDownLatch(6);

        for (int i = 1; i <= 6; i++) {
            new Thread(() -> {
                System.out.println(Thread.currentThread().getName()+" Go out");
                countDownLatch.countDown();//数量减1
            }, String.valueOf(i)).start();
        }
        countDownLatch.await();//等待计数器归零，然后再向下执行
        System.out.println("Close door");
    }
}
